Check out this cool CPU-cooler!!! Its mostly made up from useless-computer parts and its very cheap and effective! I have used the principle in which a Jet engine works. One fan is sucking in, and the other works as a exhaust fan. To check the quality I have used it on my own laptop for 7 hours continuously, and even after that, the laptop didn't heat up at all! Its a great way to reuse electronic waste products and build something useful.I use it mostly during long hours of movie-downloading!

Things I've used:

1. A smps I got from the computer shop garbage

2. A vintage- AMD processor fan(with the radiator) I got from a computer workshop.

3. Iron wires(for attaching the fans and radiator)

4. Exhausted refills(pen refills)

5. Two LEDs

6. Wires

7. Resistors

8. A usb cable I got from a damaged PC-mouse.

9. Soldering kit

10. Tape

11. A 12 V adapter

Step 1: Attach the Fans With the Radiator

Attach both the fans with the radiator with iron wire. Use the screw holes on the fans for better support while attaching the fans. I have used pen-refills to seal the fixing(as you can see in the image). You can attach the fans in any way you like but make sure that it doesn't create obstruction to the fans.

NOTE: The stickers on the fans should face opposite directions.

Step 2: Connect the Fan-wires

After attaching the fans with the radiators, connect the fan wires in such a way that the small fan sucks air in, and the bigger fan acts as a exhaust system. To do this, first check the air flow of the individual fans by attaching them to a power source. The motive is to use the principle in which a jet-engine works.

Step 3: Attaching LEDs for a COOL-look!

I have used two multi-color LEDs for this purpose. I have connected the LEDs with the USB-cable so that the Leds are powered by the computer itself.

CAUTION: The USB connection is of 5Vs. I need 3Vs for my LEDs. So, I have used two resistors to reduce the supply.

Once you have connected the LEDs properly, insert the LEDs in the middle gap of the radiator.

Step 4: Power Supply

You'll need a 12V adapter for powering the fans.Remember that both the fans will be connected to the same adapter. The LEDs will be powered by the USB connection. So now, just plug in and enjoy!